World Library  


 
  • Cover Image

The Metric Documentation of Cham Towers in Vietnam by Spherical Ph...

By: E. S. Malinverni; G. Fangi; A. N. Tassetti

Description: Università Politecnica Marche, Ancona, Italy. The Università Politecnica delle Marche is charged of the study, survey and documentation of the Chan towers in Vietnam. The towers are spread near the coastline from latitude 16° 30', to latitude of 10° 56'. The Champa civilization flourished from 8th century till 17th century produced the Cham towers, places of religious worship. The ancient Cham people created a developed culture expressed in the architectu...

Read More
  • Cover Image

Teaching Digital Earth Technologies in Environmental Sciences : Vo...

By: J. A. Griffiths

Description: UNNC, Department of Geographical Sciences, 199 Taikang Dong Lu, Ningbo, China. As part of a review process for a module entitled Digital Earth which is currently taught as part of a BSc in Environmental Sciences program, research into the current provision of Geographical Information Science and Technology (GIS&T) related modules on UKbased Environmental Science degrees is made. The result of this search is used with DiBiase et al. (2006) Body of Knowledge...

Read More
  • Cover Image

Calibration and Accuracy Analysis of a Focused Plenoptic Camera : ...

By: F. Quint; N. Zeller; U. Stilla

Description: Institute of Applied Research (IAF), Karlsruhe University of Applied Sciences, 76133 Karlsruhe, Germany. In this article we introduce new methods for the calibration of depth images from focused plenoptic cameras and validate the results. We start with a brief description of the concept of a focused plenoptic camera and how from the recorded raw image a depth map can be estimated. For this camera, an analytical expression of the depth accuracy is derived f...

Read More
  • Cover Image

Accuracy and Block Deformation Analysis in Automatic Uav and Terre...

By: Menna; Saleri; Remondino; Nocerino

Description: 3D Optical Metrology (3DOM) unit, Bruno Kessler Foundation (FBK), Trento, Italy. The paper reports the results of an integrated Unmanned Aerial Vehicle (UAV) and terrestrial photogrammetric survey realized in the archaeological site of the Roman theatre in Ventimiglia, Italy. The main deliverables were 2D drawings at scale 1:20, which required a Ground Sample Distance (GSD) less than 4 mm and, consequently, accuracy better than 4 mm. The UAV was employed t...

Read More
  • Cover Image

Comparative Study of Two Automatic Registration Algorithms : Volum...

By: M Crawford; D. Grant; J. Bethel

Description: School of Civil Engineering and Geosciences, Newcastle University, NE1 7RU, UK. The Iterative Closest Point (ICP) algorithm is prevalent for the automatic fine registration of overlapping pairs of terrestrial laser scanning (TLS) data. This method along with its vast number of variants, obtains the least squares parameters that are necessary to align the TLS data by minimizing some distance metric between the scans. The ICP algorithm uses a model-data conc...

Read More
  • Cover Image

Scene-layout Compatible Conditional Random Field for Classifying T...

By: G. Sohn; C. Luo

Description: GeoICT Laboratory, Department of Earth and Space Science, York University, 4700 Keele Street, Toronto, Ontario, M3J 1P3, Canada. Terrestrial Laser Scanning (TLS) rapidly becomes a primary surveying tool due to its fast acquisition of highly dense threedimensional point clouds. For fully utilizing its benefits, developing a robust method to classify many objects of interests from huge amounts of laser point clouds is urgently required. Conditional Random Fi...

Read More
  • Cover Image

Urban Object Extraction from Digital Surface Model and Digital Aer...

By: U. Kanjir; D. Grigillo

Description: Faculty of Civil and Geodetic Engineering, University of Ljubljana, Jamova cesta 2, Ljubljana, Slovenia. The paper describes two different methods for extraction of two types of urban objects from lidar digital surface model (DSM) and digital aerial images. Within the preprocessing digital terrain model (DTM) and orthoimages for three test areas were generated from aerial images using automatic photogrammetric methods. Automatic building extraction was don...

Read More
  • Cover Image

A Classification Algorithm for Hyperspectral Data Based on Synerge...

By: P. Reinartz; D. Cerra; R. Mueller

Description: German Aerospace Center (DLR), Muenchner Strasse 20, Oberpfaffenhofen, 82234 Wessling, Germany. This paper presents a new classification methodology for hyperspectral data based on synergetics theory, which describes the spontaneous formation of patterns and structures in a system through self-organization. We introduce a representation for hyperspectral data, in which a spectrum can be projected in a space spanned by a set of user-defined prototype vector...

Read More
  • Cover Image

3D Modeling from Gnomonic Projections : Volume I-3, Issue 1 (13/07...

By: M. Scaioni; M. Previtali; L. Barazzetti

Description: Politecnico di Milano, Department of Building Environment Science and Technology, Via M. d'Oggiono, 18/a, 23900 Lecco, Italy. The paper presents a strategy able to derive and process high resolution images created by means of gnomonic projections. The implemented pipeline can be split into two phases: first, the sensor resolution of the camera is physically increased by acquiring and merging a set of images with a rotating camera equipped with a long focal...

Read More
  • Cover Image

A Novel Graph Based Fuzzy Clustering Technique for Unsupervised Cl...

By: B. Krishna Moohan; B. Banerjee

Description: Satellite Image Analysis Lab, Center of Studies in Resources Engineering (CSRE), Indian Institute of Technology Bombay, Mumbai, India. This paper addresses the problem of unsupervised land-cover classification of multi-spectral remotely sensed images in the context of self-learning by exploring different graph based clustering techniques hierarchically. The only assumption used here is that the number of land-cover classes is known a priori. Object based i...

Read More
  • Cover Image

An Interactive Tool for Analysis and Optimization of Texture Param...

By: A. A. Sima; I. Viola; S. J. Buckley

Description: Centre for Integrated Petroleum Research (UniCIPR), Postboks 7810, 5020 Bergen, Norway. Texture mapping is a common method for combining surface geometry with image data, with the resulting photorealistic 3D models being suitable not only for visualization purposes but also for interpretation and spatiameasurement, in many application fields, such as cultural heritage and the earth sciences. When acquiring images for creation of photorealistic models, it is ...

Read More
  • Cover Image

Network Snakes for Adapting Gis Roads to Height Data of Different ...

By: J. Göpfert; F. Rottensteiner; C. Heipke

Description: Institute of Photogrammetry and GeoInformation, Leibniz Universität Hannover, Germany. In order to tackle the problem of consistently integrating 2D vector data and a DTM, we presented an approach for the adaptation of 2D GIS road objects to airborne laser scanning (ALS) data using active contours (snakes) in (Göpfert et al., 2011). In this paper the algorithm is modified for the integration of stereo images as an alternative data source for area-wide heig...

Read More
  • Cover Image

The Documentation and Reintegration of a Lost Past : Volume Ii-5, ...

By: C. Gottardi; F. Guerra; N. Brussa; C. Balletti

Description: Università Iuav di venezia, Venezia, Italy. The paper describes how new digital methodologies can be used within the field of Cultural Heritage, not only with the aim of documenting the actual state of an architecture but to review the past transformations it has undergone, conserving and representing these histories as well.

Over the last few years, the methodologies of acquisition and integrated representation for 3D patrimony documentation ha...

Read More
  • Cover Image

Esri Canada : Volume Ii-2, Issue 1 (11/11/2014)

Read More
  • Cover Image

Spatial and Temporal Variation of Japanese Encephalitis Disease an...

By: S. Verma; R. D. Gupta

Description: GIS Cell, Motilal Nehru National Institute of Technology Allahabad- 211004, UP, India. In recent times, Japanese Encephalitis (JE) has emerged as a serious public health problem. In India, JE outbreaks were recently reported in Uttar Pradesh, Gorakhpur. The present study presents an approach to use GIS for analyzing the reported cases of JE in the Gorakhpur district based on spatial analysis to bring out the spatial and temporal dynamics of the JE epidemic...

Read More
  • Cover Image

Inheriting Texture Maps Between Different Complexity 3D Meshes : V...

By: C. Chamzas; G. Ioannakis; A. Symeonidis; A. Koutsoudis

Description: Dept. of Electrical and Computer Engineering, Democritus University of Thrace, Greece. 3D digitisation has been applied in different application domains. Due to the continuous growing interest, commercial and experimental 3D acquisition systems have evolved. Nevertheless, there isn't an all-in-one solution, thus there is a need for combining different technologies in order to exploit the advantages of each approach. In this paper, we present a solution to ...

Read More
  • Cover Image

The Blake-zisserman Model for Digital Surface Models Segmentation ...

By: A. Vitti; M. Zanetti

Description: Department of Civil, Environmental and Mechanical Engineering, University of Trento, Trento, Italy. The Blake-Zisserman functional is a second-order variational model for data segmentation. The model is build up of several terms, the nature and the interaction of them allow to obtain a smooth approximation of the data that preserves the constant-gradient areas morphology, which are explicitly detected by partitioning the data with the graph of two special ...

Read More
  • Cover Image

Effects of Building Primitive Library and Automatic Correction of ...

By: G. Vosselman; S. Oude Elberink; B. Xiong

Description: ITC, University of Twente, the Netherlands. The reconstruction of 3D building models has been extensively researched in the last decade. The model driven methods, which fit building parts to predefined building primitives and glue them together into complete buildings, have been proved to be powerful. This paper solves two open questions left in prior works. Firstly, the primitive building libraries defined in literature are limited to few types of buildi...

Read More
  • Cover Image

Eco-environmental Assessment and Analysis of Tonglvshan Mining Are...

By: T. F. Long; X. M. Zhang; W. L. Jiao; Z. M. Zhang; M. M. Wang; G. Z. Wang; G. J. He; Y. Peng; H. C. Liu

Description: Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100094,China. Mine exploitation has a significant impact on the ecological environment status of the surroundings. To analyze the impact of Tonglvshan Mining area to its surroundings, this paper adopted the spatiotemporal methodology based on the extracted Eco-environmental Quality Index (EQI) to analysis the extent and degree of the effect. The spatiotemporal methodologies a...

Read More
  • Cover Image

Context Models for Crf-based Classification of Multitemporal Remot...

By: F. Rottensteiner; C. Heipke; T. Hoberg

Description: IPI, Institute of Photogrammetry and GeoInformation, Leibniz Universitaet Hannover, Germany. The increasing availability of multitemporal satellite remote sensing data offers new potential for land cover analysis. By combining data acquired at different epochs it is possible both to improve the classification accuracy and to analyse land cover changes at a high frequency. A simultaneous classification of images from different epochs that is also capable of d...

Read More
 
1
|
2
|
3
Records: 1 - 20 of 45 - Pages: 



Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.